Process of tinning or coating metal sheets.



No. 854,006. PATENTED MAY 21, 1907.

L. O. STEELE.

PROGESS OF TINNING OE COATING METAL SHEETS.

APPLICATION FILED SEPT. 24. 1906.

FIG. 1

M v FIG. 2

FIG 3 22 wlTnzssas. E INVENTOR. fl g II V i V I i A UNITED STATES PATENT OFFICE LAWRENC c. sTEELE', or rI'r'rsBU e, PENNSYLVANIA PROCESS OF TINNING 'OP COATING METAL SHEETS.

Specification of Letters Patent;

Patented May 21, 1907.

Application filed- September 24, 1906. Serial No. 335.954.

To a whom it may concern:

Be it known that I, 'IIA RENCE O. STEELE, a resident of Pittsburg, in the county of Alle-- gheny and. State of Pennsylvania, have invented a new and useful Improvement in Processes of Tinning or Coatin Metal Sheets; and I 110 hereby declare the following to be a full, clear, and exact descriptionthereof.

My invention relates to tinning oncoating with other metals, its object being to-provide a simple and eflicient process of removing the surplus metal from the sheet after it has passed through the coating metal, thereby greatly reducing the waste metal a'ndgiving a more uniform coating to the-plate. To these ends my invention comprises, generally stated, the process of tinning or coating with other metals consisting in passing the sheet to be coated through molten coating metal and through the oil thereon, and applying suction at a point adjacent to the sheet and extending across the same while said sheet is passing. through the oil. The oil being drawn rapidly across the face of the sheet draws off the surplus. tin with it,

In the accoi'npanying drawing, I have illustrated a suitable apparatusfor carrying out my process ir'which Figure 1 is a vertical section of a suitable,

tinningpot; Fig. 2is a section on the line 2 2, Fig.1 Fig. 3 is an enlarged detailed sectional view of the suction apparatus.

I will first describe the apparatus illustrated for carrying out my invention and then describe the process as carried out by such apparatus. I

The numeral 2 designates asuitable tinning pot divided'into compartments 3 and 1, separated by the wall 5. The opening 6 in said well 5 brings the compartments 3 and 4 into communication with each other. Lo

cated within the compartment 4 and projecting throughthc opening 6 into the compart-" ment 3 is the guide or apron 7 ,whiclymay be formed of a single casting with the flange 8 resting upon'the outer-wall of the pot and supported at its inner end by the lower por tion of the partition 6 which separates the compartments 3 and 4. The front of the apron 7 is provided with the openings 9 by means of whichthe metal is permitted to enter the apron. At the upper end of the apron 7 iswhat is termed the flux box-10, which con tains suitable flux 11 which floats upon the tin 12 contained in the pot. end 13 of the apron 7=projects slightly beyond The forward the main portion of said apron and acts to guide the plate up through the rolls 14, which are located within the compartment 3 of the pot. These rolls'may .be driven by suitable gears 15 connected up to the source of power. I I v "he tin 12 within the pot rises to the same level in both compartments andabove'the tin in compartment 3 and resting thereon is tlic-body of oil, or other suitable material, 16', v

usually palm oil.

Located within-the compartment 3 and submerged in the oil above the tin-line are the suction nozzles 17 having the openings 18 .in such position with reference to each other that when the plate 21 passes between said nozzles, the said lower lips will be invery close proximity to the opposite faces of said.

plate, or in fact, may contact slightly therewith if desired. v

Connectedto suitable threaded openings 22 in the nozzles 17 are the pipes 23 which are connected to the main pipes 24 and 25.

These main pipes are connected by the T con-,

nection 26 to the single pipe 27 connected up to the pump 28. This pump 28 may be of any suitable construction for creating.

suction through the nozzle 17 and as I make noclaim as to the particular construction of the pump '1 do not deem it necessary to illustrate same in detail. This pump 28 may be driven by the pulley29 connected up by the belt 30 to a suitable motor or engine. Connected to. the exhaust 'oi the pump is the pipe 31, which projects'down into the compartment 3 of the pot and se- -cured to. the outer end ofsaid pipe is the strainer '32 of suitable construction.

Above the nozzles 17 is a second pair of rolls 33 whichact to guide the plate up out of the pot in the ordinary manner.

In carrying out my invention with the I above described apparatus, the plate 21 to be coated-, is introduced int the. flux box 10 and passing through the ux enters the tin bath lanfdis forced down through the apron until it is forced up in position to be grasped by the rolls 14. The rolls draw the plate upward through the molten metal and as it plate the action will be the same the entire width of the plate so that the removal ofthe tin is uniform, leaving a substantially uni"- form coating on the tin as it passes beyondthe nozzles. The oil and tin drawn in by the suction of the nozzles 17 is carried by the pump 28 through the pipes 23, 24, and

26 into the pump whence it is discharged through the pipe 31. As there will be a certain amount of refuse and foreign matter in the tin and oil as it comes from the pump, I have provided the strainer 32 by means of whichthe oil and tin are strained before they pass back again into the pot to be used again in the tinning process. j V

.By my improved process I provide forthe removal of the surplus or waste tin, leaving a coating of suilicient thickness and of substantial uniformity upon the plate, While at the same time any foreign matter 'ordirt. is

removed, giving a surface of unusual quality;

The process further greatly expedites the process of tinning. and reduces the quantity of palm oil necessary, as there is absolutelyno waste and the surplus oil and tin removed is all carried back into the pot again to be re-used. By drawing off the oil and tin in this method, better opportunity is afforded for filtering theoiland keeping the bath free from foreign matter or impurities.

What I" claim as my invention is:

1."A process of tinning or coating with other metals, consisting in passing the sheet f to be coated through the molten coatingmetal and through the oil, or similar sub-.

stance, thereon and applying suction at a point adjacent to the sheet and extending across the same as said sheet passes through said oil. I

- 2. The process of tinning or coating with other metals, consisting in passing the sheet to be coated, through the molten metal and through the oil, 0r similar substance, there The power 1 metal.

on and applyingsuetion at a point adjacent to the sheet on opposite sides thereof and extending across the same as said sheet other metals, consisting in passing the sheet to be coated through the molten coating metal and through the/oil, or similar. substance thereon, and applying suction at a point adjacent .to the sheet andextending across the same. just above the line of the 4, The process of tinning or coating with other metals, consisting in passing the sheet to be coated through, the molten coating metal and the oil, or similar substance, thereon, and drawing otl' bysuction. applied adjacent to the sheet and'across the same, a portion of theoil and with it the surplus tin.

5. The process-of tinning or coating with other metals, consisting inpassing the sheet to be coated through the molten coating metal and the oil, or-similar substance, thereon, applying suction at a point'adjacent to the sheet and extending across the same whilesaid sheet passes through said oil and returning the oil and metal so removed to the pot. v

-6. The process ,of tinning orv coating with other'nietals, consisting in passing the sheet to be coated through the molten coating vmetaland the, oil, or similar substance, there on, applying suction at a point adjacent to the sheet andextending across the same while said sheet passes through the oil and filtering, cleaning the oil removed andreturning same to the pot.

7. The process of tinning or coating with other metals, consisting in passing the sheet to be coated through the molten metal and through the oil, or similar. substance thereon, and drawing the said oil over the surface of said sheet as it passes through the oil.

8. The-process of tinning or coating with other metals, consisting in passing the sheet to be coated through the molten metal and through the oil, or similar substance thereon,

and drawing the said oil down overthe sur- In testimony whereof, I the said LAWRENCE C.- STEELE have hereunto set my hand.

L. o. STEELE.

of said sheet as it passes through "said Witnesses I'IARRY 'C. WALLEY, S. M. DUMM. 

